Milton foreman



(No Model.)

- M. FORE-MAN.

STEAM GENERATORAND'SUPERHBATER. I No. 333,222. Patented Mar. 16,1886.

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NlIED STATES ATENT OFFICE.

MILTON FOREMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO LYDIE K. FOREMAN, OF SAME PLACE. I

STEAM GENERATOR AND SUPERHEATER.

SPECIFICATION forming part of Letters Patent No.338,222, dated March 16,1886.

Application filed November 19, 1885. Serial No. 183,327.

To all whom it may concern.-

Be it known that I, MILTON FOREMAN, a citizen of the United States, residing in Philadelphia, Pennsylvania, hay e invented certain Improvements in Steam Generators and Superheaters, of which the following is a specification.

The object of my invention is to so combine a superheater with a steam or vapor generator as to insure the proper superheating of the steam or vapor without subjecting the superheater to such a high temperature as would have a tendency to burn the coils or pipes of the same. This object I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawings, in which- Figure l is a longitudinal section of-a combined steam generator and superheater constructed in accordance with my invention,and Fig. 2 is a transverse section of the same on the line 1 2.

My improved generator and superheater, although applicable for general use, has been designed especially for use in carrying out the system of steaurheating set forth in my Patent No. 325,667, dated September 8, 1885,said system consisting in generating steam or vapor under low pressure, superheating the steam or vapor without increasing the pressure of the same, and then circulating the low-pressure high-temperature steam or vapor through the radiators. The pressure to be carried is not intended to be more than ten or twelve pounds, and vapor under such pressure can be generated with a comparatively low temperature in the comb ustion-charnber; hence where both the generator and the superheater are in the same furnace it is not advisable to locate the superheater at a point remote from the fire-place, while on the other hand too close proximity of the superheater to the fire is to be avoided, in order to prevent the burning of the tubes composing the superheater. For this reason I propose to locate the superheater within the limits of the generator.

The generator shown in the drawings is substantially similar to that set forth in my Letters Patent No. 185,171, dated December 12, 1876, and comprises a series of sections, each consisting of vertical pipes A and transverse (No model.)

connecting-pipes B, the upper pipe of each section communicating with the steam-drum D, and the lower pipe of each section communicating at its opposite ends with boxes F, embedded in the walls a of the furnace, these boxes communicating with each other and being clamped together by means of bolts 1).

There are in the present instance three transverse connecting-pipes; but instead of connecting the upper and intermediate transverse pipes of each section by a series of pipes from end to end, I use a connecting-pipe at each end only, and in the space thus afforded I place the superheater, which in the present instance consists of a lowermanifold, G, and an upper manifold, H, connected together by aseries of coils, g, the lower manifold communicating with the steam-drum through a pipe, h, and the upper manifold being provided with a discharge-pipe, 2'. By this means a body of water is always maintained below, above, and at the sides of the superheater, so that while said superheater occupies a position comparatively close to the fire-place J, the products of combustion cannot gain access to the superheater without first coming into contact with the water-circulating pipes of the generator, and hence the degree of heat to which the superheater is subjected, while sufficient to impart the required temperature to the steam or vapor passing through said superheater, is not itself of so much higher a temperature as to have any tendencyto burn the tubes of which the superheateris composed.

If it is desired to completely inclose the superheater, the end sections of the generator may have a complete set of tubes, A, both above and below; but it is preferred to construct the generator as shown in the drawings, so that after said generator is properly set up the superheater can be readily introduced through a detachable section, 00, of the front wall of the furnace.

I do not claim, broadly, a superheater contained within the limits of the water-space of the generator and exposed to the action of the products of combustion, as this has heretofore been proposed; but

I claim as my invention 1. The combination of the tubular lower portion of the generator with the superheater IOO located within the limits of the generator, above said tubular lower portion of the tube, whereby the products of combustion are caused to pass through the latter before reaching the super heater, all substantially as specified.

2. The combination of the combustionchamber and its fire-place, the superheater, and the generator comprising a lower tubular portion extending across the combustionchamber and an upper portion composed of tubes located at opposite sides of the combustion-chamber, so as to form a space for the reception of the superheater, all substantially as specified.

3. The combination of a superheater with a 

